Rhyolite

Rock group Igneous
Classification Extrusive/plutonic
Composition Felsic
Texture Glassy
Aphanitic
Porphyritic
Intrusive counterpart Granite
Common minerals Quartz
Sanidine
Plagioclase feldspar
Biotite
Hornblende

Rhyolite GigaPans

Rhyolite
Thunderbird rhyolite

Rhyolite in Thin Section

Thin Section GigaPans

Porphyritic rhyolite, plane polars
Porphyritic rhyolite, crossed polars

Porphyritic rhyolite, plane polars

Porphyritic Rhyolite, Plane Polars

Porphyritic rhyolite in plane polarized light. Magnification: 40x Click here to watch porphyritic rhyolite rotating in crossed polars: https://youtu.be/F186c…

Porphyritic rhyolite, crossed polars

Porphyritic Rhyolite, Crossed Polars

Porphyritic rhyolite in cross polarized light. Magnification: 40x Click here to watch porphyritic rhyolite rotating in plane polars: https://youtu.be/l0J3RCG…